<template>
  <div class="login">
    <el-form
      ref="loginRef"
      class="login-form"
      :model="loginForm"
      :rules="loginRules"
    >
      <h3 class="title">若依后台管理系统</h3>

      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          auto-complete="off"
          placeholder="账号"
          size="large"
          type="text"
        >
          <template #prefix>
            <svg-icon class="el-input__icon input-icon" icon-class="user" />
          </template>
        </el-input>
      </el-form-item>

      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          auto-complete="off"
          placeholder="密码"
          size="large"
          type="password"
          @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon class="el-input__icon input-icon" icon-class="password" />
          </template>
        </el-input>
      </el-form-item>

      <el-form-item v-if="captchaEnabled" prop="code">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="验证码"
          size="large"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon
              class="el-input__icon input-icon"
              icon-class="validCode"
            />
          </template>
        </el-input>

        <div class="login-code">
          <img class="login-code-img" :src="codeUrl" @click="getCode" />
        </div>
      </el-form-item>

      <el-checkbox
        v-model="loginForm.rememberMe"
        style="margin: 0px 0px 25px 0px"
      >
        记住密码
      </el-checkbox>

      <el-form-item style="width: 100%">
        <el-button
          :loading="loading"
          size="large"
          style="width: 100%"
          type="primary"
          @click.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>

          <span v-else>登 录 中...</span>
        </el-button>

        <div v-if="register" style="float: right">
          <router-link class="link-type" :to="'/register'">
            立即注册
          </router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2018-2025 ruoyi.vip All Rights Reserved.</span>
    </div>
  </div>
</template>

<script setup>
  import { getCodeImg } from '@/api/login'
  import Cookies from 'js-cookie'
  import { encrypt, decrypt } from '@/utils/jsencrypt'
  import useUserStore from '@/store/modules/user'

  const userStore = useUserStore()
  const route = useRoute()
  const router = useRouter()
  const { proxy } = getCurrentInstance()

  const loginForm = ref({
    username: 'admin',
    password: 'admin123',
    rememberMe: false,
    code: '',
    uuid: '',
  })

  const loginRules = {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
  }

  const codeUrl = ref('')
  const loading = ref(false)

  // 验证码开关
  const captchaEnabled = ref(true)

  // 注册开关
  const register = ref(false)
  const redirect = ref(undefined)

  watch(
    route,
    (newRoute) => {
      redirect.value = newRoute.query && newRoute.query.redirect
    },
    { immediate: true },
  )

  function handleLogin() {
    proxy.$refs.loginRef.validate((valid) => {
      if (valid) {
        loading.value = true

        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set('username', loginForm.value.username, { expires: 30 })
          Cookies.set('password', encrypt(loginForm.value.password), {
            expires: 30,
          })
          Cookies.set('rememberMe', loginForm.value.rememberMe, { expires: 30 })
        } else {
          // 否则移除
          Cookies.remove('username')
          Cookies.remove('password')
          Cookies.remove('rememberMe')
        }

        // 调用action的登录方法
        userStore
          .login(loginForm.value)
          .then(() => {
            const query = route.query
            const otherQueryParams = Object.keys(query).reduce((acc, cur) => {
              if (cur !== 'redirect') {
                acc[cur] = query[cur]
              }
              return acc
            }, {})
            router.push({
              path: redirect.value || '/',
              query: otherQueryParams,
            })
          })
          .catch(() => {
            loading.value = false

            // 重新获取验证码
            if (captchaEnabled.value) {
              getCode()
            }
          })
      }
    })
  }

  function getCode() {
    getCodeImg().then((res) => {
      captchaEnabled.value =
        res.captchaEnabled === undefined ? true : res.captchaEnabled
      if (captchaEnabled.value) {
        codeUrl.value = `data:image/gif;base64,${res.img}`
        loginForm.value.uuid = res.uuid
      }
    })
  }

  function getCookie() {
    const username = Cookies.get('username')
    const password = Cookies.get('password')
    const rememberMe = Cookies.get('rememberMe')
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password:
        password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
    }
  }

  getCode()
  getCookie()
</script>

<style lang="scss" scoped>
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url('../assets/images/login-background.jpg');
    background-size: cover;
  }
  .title {
    margin: 0px auto 30px auto;
    text-align: center;
    color: #707070;
  }

  .login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;
    .el-input {
      height: 40px;
      input {
        height: 40px;
      }
    }
    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }
  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }
  .login-code {
    width: 33%;
    height: 40px;
    float: right;
    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }
  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }
  .login-code-img {
    height: 40px;
    padding-left: 12px;
  }
</style>
